Articulating apparatus for endoscopic procedures with timing system

ABSTRACT

An endoscopic surgical device includes a handle assembly including a drive mechanism actuatable by a trigger; and an endoscopic assembly including a proximal end portion extending from the handle assembly; a distal end portion pivotably connected to the proximal end portion of the endoscopic assembly; and a rotatable inner actuation shaft extending from the handle assembly and into the distal end portion of the endoscopic assembly, the inner actuation shaft including a flexible portion extending across the pivot connection. The surgical device includes an end effector selectively connectable to the distal end portion of the endoscopic assembly and to a distal portion of the rotatable inner actuation shaft. The end effector includes a splined inner tube rotatably supported in an outer tube; and a plurality of surgical anchors loaded in the inner tube. A timing system allows removal of the end effector at a defined trigger position.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No. 14/282,317, filed May 20, 2014 (now U.S. Pat. No. 9,668,730), which claims the benefit of and priority to U.S. Provisional Patent Application Ser. No. 61/840,937, filed Jun. 28, 2013, the entire contents of each of which is incorporated by reference herein.

BACKGROUND

1. Technical Field

The present disclosure relates to surgical apparatus, devices and/or systems for performing endoscopic surgical procedures and methods of use thereof. More specifically, the present disclosure relates to surgical apparatus, devices and/or systems for performing endoscopic surgical procedures which includes an articulating endoscopic portion.

2. Background of Related Art

During laparoscopic or endoscopic surgical procedures, access to a surgical site is achieved through a small incision or through a narrow cannula inserted through a small entrance wound in a patient. Because of limited area to access the surgical site, many endoscopic surgical devices include mechanisms for articulating the tool assembly of the device. Typically, the articulating mechanism is controlled by an actuator which has to be manipulated by a surgeon to properly orient the tool assembly in relation to tissue to be treated.

Accordingly, a need exists for endoscopic surgical devices which include features which indicate to the surgeon whether the endoscopic portion of the surgical device, when in the surgical site, is in a non-articulated or articulated orientation.

SUMMARY

The present disclosure relates to surgical apparatus, devices and/or systems for performing endoscopic surgical procedures which includes an articulating endoscopic portion.

According to an aspect of the present disclosure, an endoscopic surgical device is provided. The surgical device includes a handle assembly including a handle housing and a trigger operatively connected to the handle housing, and a drive mechanism actuatable by the trigger; and an endoscopic assembly including a proximal end portion extending from the handle assembly; a distal end portion pivotably connected to the proximal end portion of the endoscopic assembly at a pivot point; and a rotatable inner actuation shaft extending from the handle assembly and into the distal end portion of the endoscopic assembly, the inner actuation shaft including a flexible portion extending across the pivot point, the inner actuation shaft being connected to the drive mechanism of the handle assembly such that an actuation of the trigger results in a rotation of the inner actuation shaft.

The surgical device further includes an end effector selectively connectable to the distal end portion of the endoscopic assembly and to a distal portion of the rotatable inner actuation shaft. The end effector includes an outer tube having a helical thread along an inner surface thereof; a splined inner tube rotatably supported in the outer tube, wherein the splined inner tube is defined by a pair of opposed longitudinally extending tines and a pair of opposed longitudinally extending channels, a proximal end of the splined inner tube being configured for non-rotatable selective connection to a distal end of the rotatable inner actuation shaft when the end effector is connected to the distal end portion of the endoscopic assembly; and a plurality of surgical anchors loaded in the inner tube of the end effector, wherein each anchor includes a threaded body portion, and a head portion defining a pair of opposed radially outer threads and a pair of opposed radial recesses, wherein the pair of radial recess of each head portion receive respective tines of the inner tube and wherein the pair of opposed radially outer threads of each head portion project from the pair of opposed longitudinally extending channels of the inner tube and engage the inner helical thread of the outer tube.

The endoscopic assembly may include a support tube assembly having a proximal support tube portion extending from the handle assembly, and a distal support tube portion pivotally connected to proximal support tube portion thereby defining an articulation joint therebetween.

The endoscopic assembly may include an articulation tube slidably supported in the support tube assembly, a proximal end of the articulation tube being connected to an articulation actuator supported on the handle assembly, and a distal end of the articulation tube being pivotably connected to an articulation link that is also pivotably connected to the distal support tube portion of the support tube assembly.

The inner actuation shaft may be is rotatably supported in the articulation tube. The inner actuation shaft may include a proximal shaft portion operatively connected to the drive mechanism, a distal shaft portion non-rotatably connected to a distal end of the proximal shaft portion, and a coupling member non-rotatably connected to a distal end of the distal shaft portion.

The distal shaft portion of the inner actuation shaft may be the flexible portion.

The flexible portion of the inner actuation shaft may be relatively more flexible than the proximal shaft portion of the inner actuation shaft.

In use, an actuation of the trigger may result in a rotation of the inner actuation shaft of the endoscopic assembly.

The drive mechanism may transmit the actuation of the trigger into rotation of the inner actuation shaft of the endoscopic assembly.

The endoscopic assembly may include an inner articulation tube assembly having the articulation tube defining a proximal end and a distal end, the proximal end of the articulation tube being operatively connected to the articulation actuator. The articulation link may have a proximal end pivotally connected to the distal end of the articulation tube.

The handle assembly may include an articulation knob rotatably supported thereon. The articulation knob may be the articulation actuator. The articulation knob may define an inner helical thread, the proximal end of the articulation tube may be operatively connected to the articulation tube such that rotation of the articulation knob causes the articulation tube to axially translate.

In use, axial translation of the articulation tube may cause the distal support tube portion of the support tube assembly to pivot about the pivot point.

The endoscopic assembly may include a connection nut fixedly secured to the proximal end of the articulation tube. The connection nut may define an outer helical thread and may meshingly engage the inner helical thread of the articulation knob.

The endoscopic assembly may support a ball detent in the distal support tube portion of the support tube assembly. The ball detent may have a projected position wherein the ball detent partially projects radially outward from the distal support tube portion of the support tube assembly. The ball detent may have a retracted position wherein the ball detent does not project radially outward from the distal support tube portion of the support tube assembly as far as when in the projected position.

The ball detent may ride along an outer surface of the coupling member of the inner actuation shaft of the endoscopic assembly.

The inner actuation shaft may be axially translatable between a proximal position wherein the ball detent is in the retracted position and a distal position wherein the coupling member of the inner actuation shaft holds the ball detent in the projected position.

In use, when the end effector is connected to the distal end portion of the endoscopic assembly, and when the ball detent is in the projected position, the ball detent may engage a recess in the end effector to secure the end effector to the distal end portion of the endoscopic assembly.

The inner actuation shaft may be axially translatable within the articulation tube.

A proximal end of the proximal shaft portion of the inner actuation shaft may support a pair of axially spaced apart radial flanges.

The handle assembly may include a slider supported thereon. A stem of the slider may extend between the pair of axially spaced apart radial flanges supported on the inner actuation shaft.

The slider may be movable between a proximal position and a distal position. In use, movement of the slider between the proximal position and the distal position may result in movement of the inner actuation shaft between a respective proximal position and a distal position.

The slider may be in the proximal position, the end effector is connectable to the to the distal end portion of the endoscopic assembly. In use, when the slider is in the distal position, the end effector may be secured to the to the distal end portion of the endoscopic assembly.

The endoscopic assembly may support a ball detent in the distal support tube portion of the support tube assembly. The ball detent may have a projected position wherein the ball detent partially projects radially outward from the distal support tube portion of the support tube assembly. The ball detent may have a retracted position wherein the ball detent does not project radially outward from the distal support tube portion of the support tube assembly as far as when in the projected position.

The ball detent may ride along an outer surface of the coupling member of the inner actuation shaft of the endoscopic assembly.

The ball detent may be in the retracted position when the inner actuation shaft is in the proximal position. The ball detent may be in the projected position when the inner actuation shaft is in the distal position.

In use, when the end effector is connected to the distal end portion of the endoscopic assembly, and when the ball detent is in the projected position, the ball detent may engage a recess in the end effector to secure the end effector to the distal end portion of the endoscopic assembly.

The handle assembly may include a button supported thereon. The button may include a first position wherein the button blocks movement of the slider, and a second position wherein the button permits movement of the slider.

The button may include a wall extending therefrom. In use, when the button is in the first position, the trigger may be actuatable and the slider may be blocked from moving to the proximal position; and when the button is in the second position, the wall of the button may block the actuation of the trigger and the slider may be free to move to the proximal position.

The handle assembly may include a biasing member tending to maintain the button in one of the first portion and the second position thereon.

The button may include a wall extending therefrom. In use, when the button is in the first position, the trigger is actuatable; and when the button is in the second position, the wall of the button blocks actuation of the trigger.

The distal end portion of the endoscopic assembly may be pivotable when the button is in the second position.

The coupling member of the inner actuation shaft may have a non-circular transverse cross-sectional profile, and wherein the proximal end of the splined inner tube of the end effector may have a splined inner tube rotatably supported in the outer tube. The splined inner tube may be defined by a pair of opposed longitudinally extending tines and a pair of opposed longitudinally extending channels. A proximal end of the splined inner tube may have a transverse cross-sectional profile that complements the non-circular transverse cross-sectional profile of the coupling member.

The handle assembly may include an audible/tactile feedback system associated with the trigger. The audible/tactile feedback system may produce at least one of an audible feedback and a tactile feedback when the trigger is in one of a locked out position for loading and unloading an end effector to the endoscopic assembly, when the trigger has been fully actuated, and when the trigger returns to a home position.

The distal end portion of the endoscopic assembly may be articulatable between a non-articulated orientation and a plurality of articulated orientations relative to the proximal end portion thereof.

According to another aspect of the present disclosure, an end effector for selective connection to a rotatable drive shaft of a surgical handle assembly is provided. The end effector includes an outer tube having a helical thread along an inner surface thereof a splined inner tube rotatably supported in the outer tube, wherein the splined inner tube is defined by a pair of opposed longitudinally extending tines and a pair of opposed longitudinally extending channels, a proximal end of the splined inner tube being configured for non-rotatable selective connection to a distal end of the rotatable drive shaft of the surgical handle assembly when the end effector is connected thereto; and a plurality of surgical anchors loaded in the inner tube.

Each anchor includes a threaded body portion; and a head portion defining a pair of opposed radially outer threads and a pair of opposed radial recesses, wherein the pair of radial recess of each head portion receive respective tines of the inner tube and wherein the pair of opposed radially outer threads of each head portion project from the pair of opposed longitudinally extending channels of the inner tube and engage the inner helical thread of the outer tube.

The proximal end of the inner tube may have a non-circular transverse cross-sectional profile.

The helical thread of the outer tube may be defined by a helical coil.

The inner tube may be fixed against longitudinal displacement relative to the outer tube.

Each surgical anchor may be formed from a bioabsorbable material.

According to still a further aspect of the present disclosure, an endoscopic surgical device configured to fire a surgical anchor into target tissue is provided. The surgical device includes a handle assembly including a handle housing; a trigger operatively connected to the handle housing, the trigger including at least a fully un-actuated position; a drive mechanism actuatable by the trigger; and a timing system associating the trigger with the drive mechanism.

The surgical device further includes an endoscopic assembly including a proximal end portion extending from the handle assembly; a distal end portion configured to support an end effector; and a rotatable inner actuation shaft extending from the handle assembly and into the distal end portion of the endoscopic assembly, the inner actuation shaft being connected to the drive mechanism of the handle assembly such that an actuation of the trigger results in a rotation of the inner actuation shaft to fire a surgical anchor of the surgical device.

In use, the timing system maintains a timing of an actuation stroke of the trigger with an actuation of the drive mechanism to fire a single surgical anchor upon a single stroke of the trigger from the fully un-actuated position, to a fully actuated position, to the fully un-actuated position.

The timing system may include a raceway formed in a surface of the trigger, the raceway defining a plurality of steps along a length thereof; and a deflectable arm having a first end disposed within the raceway and operatively associated with the steps thereof, and a second end connected to the handle housing.

The distal end of the deflectable arm may ride through the raceway when the trigger is actuated. The distal end of the deflectable arm may ride through the raceway in a single direction during a complete stroke of the trigger.

The steps of the raceway may block movement of the distal end of the deflectable arm, in a reverse direction, through the raceway, when the trigger is partially actuated.

The raceway may define a home position for the distal end of the deflectable arm when the trigger is in the fully un-actuated position.

The handle assembly may include a button supported thereon. The button may include a first position wherein the button permits actuation of the trigger, and wherein the bottom may include a second position wherein the button blocks actuation of the trigger.

The button may include a wall extending therefrom. In use, when the button is in the second position the wall of the button may block actuation of the trigger.

The trigger may define a notch formed therein. In use, the wall of the button may enter the notch of the trigger when the trigger is in the fully un-actuated position and when the button is in the second position.

The timing system may include a raceway formed in a surface of the trigger, the raceway defining a plurality of steps along a length thereof; and a deflectable arm having a first end disposed within the raceway and operatively associated with the steps thereof, and a second end connected to the handle housing.

The distal end of the deflectable arm may ride through the raceway when the trigger is actuated.

The distal end of the deflectable arm may ride through the raceway in a single direction during a complete stroke of the trigger.

The steps of the raceway may block movement of the distal end of the deflectable arm, in a reverse direction, through the raceway, when the trigger is partially actuated and then un-actuated.

The raceway may define a home position for the distal end of the deflectable arm when the trigger is in the fully un-actuated position.

The endoscopic assembly may include a support tube assembly having a proximal support tube portion extending from the handle assembly, and a distal support tube portion configured to removably receive the end effector. The inner actuation shaft may be rotatably supported in the support tube, the inner actuation shaft including a proximal portion operatively connected to the drive mechanism, and a distal portion non-rotatably supporting a coupling member.

In use, an actuation of the trigger may result in an actuation of the drive mechanism to rotate the inner actuation shaft of the endoscopic assembly.

The endoscopic assembly may support a ball detent in the distal support tube portion of the support tube assembly. The ball detent may have a projected position wherein the ball detent partially projects radially outward from the distal support tube portion of the support tube assembly. The ball detent may have a retracted position wherein the ball detent does not project radially outward from the distal support tube portion of the support tube assembly as far as when in the projected position.

The ball detent may ride along an outer surface of the coupling member of the inner actuation shaft of the endoscopic assembly.

The inner actuation shaft may be axially translatable between a proximal position wherein the ball detent is in the retracted position and a distal position wherein the coupling member of the inner actuation shaft holds the ball detent in the projected position.

In use, the inner actuation shaft may be axially translatable only when the trigger is in the fully un-actuated position.

In use, when the end effector is connected to the distal end portion of the endoscopic assembly, and when the ball detent is in the projected position, the ball detent may engage a recess in the end effector to secure the end effector to the distal end portion of the endoscopic assembly.

Further details and aspects of exemplary embodiments of the present invention are described in more detail below with reference to the appended figures.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the present disclosure are described herein with reference to the accompanying drawings, wherein:

FIG. 1 is a perspective view of a surgical anchor for use in an endoscopic surgical device in accordance with the present disclosure;

FIG. 2 is a side, elevational view of the surgical anchor of FIG. 1;

FIG. 3 is a distal, end view of the surgical anchor of FIGS. 1 and 2;

FIG. 4 is a side, elevational view, partially broken away, of the surgical anchor of FIGS. 1-3;

FIG. 5 is an endoscopic surgical device according to an aspect of the present disclosure;

FIG. 6 is a perspective view, with parts separated, of the endoscopic surgical device of FIG. 5;

FIG. 7 is an enlarged view of the indicated area of detail of FIG. 6;

FIG. 8 is a rear perspective view, with a first housing half-section removed therefrom, of a handle assembly of the endoscopic surgical device of FIG. 5;

FIG. 9 is a front perspective view, with a second housing half-section removed therefrom, of a handle assembly of the endoscopic surgical device of FIG. 5;

FIG. 10 is a rear perspective view, with a second housing half-section and trigger removed therefrom, of the handle assembly of the endoscopic surgical device of FIG. 5;

FIG. 11 is a rear perspective view, with parts separated, and with a second housing half-section removed therefrom, of the handle assembly of the endoscopic surgical device of FIG. 5;

FIG. 12 is a perspective view of a pinion gear of the handle assembly of FIGS. 8-11;

FIG. 13 is a perspective view of a button and slider of the handle assembly of FIGS. 8-11;

FIG. 14 is a perspective view of a bevel gear of the handle assembly of FIGS. 8-11;

FIG. 15 is a front perspective view, with parts separated, of an endoscopic assembly of the endoscopic surgical device of FIG. 5;

FIG. 16 is an enlarged view of the indicated area of detail of FIG. 15;

FIG. 17 is a rear perspective view of the endoscopic surgical device of FIG. 5;

FIG. 18 is an enlarged view of the indicated area of detail of FIG. 17;

FIG. 19 is a perspective view of the distal end of the endoscopic surgical device of FIG. 5 with an end effector shown separated therefrom;

FIG. 20 is a rear perspective view of the end effector of FIG. 19;

FIG. 21 is a rear perspective view of the end effector of FIG. 20, with an outer tube removed therefrom;

FIG. 22 is a perspective view of the end effector of FIGS. 20 and 21, with an outer tube separated therefrom;

FIG. 23 is a perspective view of the end effector of FIGS. 20-22, with an outer tube removed therefrom and with parts partially separated;

FIG. 24 is a perspective view of an inner tube of the end effector of FIGS. 20-23, with a plurality of anchors of FIGS. 1-4 shown separated therefrom;

FIG. 25 is a cross-sectional view, as taken along 25-25 of FIG. 22;

FIG. 26 is a cross-sectional view, as taken along 26-26 of FIG. 22;

FIG. 27 is a cross-sectional view, as taken along 27-27 of FIG. 22;

FIG. 28 is a perspective view of the end effector of FIGS. 20-27 with a shipping wedge shown attached thereto;

FIG. 29 is a cross-sectional view as taken through 29-29 of FIG. 28;

FIG. 30 is a cross-sectional view as taken through 30-30 of FIG. 29;

FIG. 31 is a longitudinal, cross-sectional, elevational view of the endoscopic surgical device of FIG. 5;

FIG. 32 is an enlarged view of the indicated area of detail of FIG. 31;

FIG. 33 is an enlarged view of the indicated area of detail of FIG. 31;

FIG. 34 is a cross-sectional view as taken though 34-34 of FIG. 31;

FIG. 35 is an enlarged view of the indicated area of detail of FIG. 34;

FIG. 36 is an enlarged view of the indicated area of detail of FIG. 34;

FIG. 37 is an enlarged view of the indicated area of detail of FIG. 36;

FIG. 38 is a cross-sectional view as taken though 34-34 of FIG. 33;

FIG. 39 is a cross-sectional view as taken though 34-34 of FIG. 33;

FIG. 40 is a cross-sectional view as taken though 34-34 of FIG. 33;

FIG. 41 is a cross-sectional view as taken though 34-34 of FIG. 33;

FIG. 42 is an enlarged elevational view of the handle assembly shown in FIGS. 9 and 10, illustrating an operation of the slider;

FIG. 43 is a longitudinal, cross-sectional view the end effector and the endoscopic assembly of the endoscopic surgical device of FIG. 5, illustrating a first step in the decoupling thereof;

FIG. 44 is a longitudinal, cross-sectional view the end effector and the endoscopic assembly of the endoscopic surgical device of FIG. 5, illustrating a second step in the decoupling thereof;

FIG. 45 is a longitudinal, cross-sectional view an articulation knob of the handle assembly of FIGS. 5-11, illustrating a rotation thereof;

FIG. 46 is a longitudinal, cross-sectional view of a distal end of the endoscopic surgical device illustrating an articulation of the end effector relative to the endoscopic assembly due to a rotation of the articulation knob;

FIG. 47 is an enlarged elevational view of the handle assembly shown in FIGS. 9 and 10, illustrating an operation of an audible/tactile feedback member of the handle assembly, shown in an position following an initial actuation of a trigger;

FIG. 48 is an enlarged elevational view of the handle assembly shown in FIGS. 9 and 10, illustrating an operation of the audible/tactile feedback member of the handle assembly, shown in an position following a complete actuation of the trigger;

FIG. 49 is a longitudinal, cross-sectional view of the end effector and a distal end of endoscopic assembly, illustrating an implanting of a surgical anchor through a surgical mesh and into underlying tissue; and

FIG. 50 is a perspective illustration showing the anchoring and/or fixation of a surgical mesh to underlying tissue with a plurality of surgical fasteners.

DETAILED DESCRIPTION OF EMBODIMENTS

Embodiments of the presently disclosed endoscopic surgical device is described in detail with reference to the drawings, in which like reference numerals designate identical or corresponding elements in each of the several views. As used herein the term “distal” refers to that portion of the endoscopic surgical device, that is farther from the user, while the term “proximal” refers to that portion of the endoscopic surgical device that is closer to the user.

Non-limiting examples of endoscopic surgical devices which may include articulation joints according to the present disclosure include manual, mechanical and/or electromechanical surgical tack appliers (i.e., tackers) and the like.

Referring initially to FIGS. 1-4, a surgical anchor for use with the surgical tack applier of the present disclosure is illustrated and generally designated as anchor 100. As seen in FIGS. 1-4, anchor 100 includes a head section 110, a mesh retention section 120, and a threaded tissue-snaring section 130. Head section 110 includes a pair of opposing threaded sections 112 a, 112 b having respective radially, outer, helical head threads 114 a, 114 b, and a pair of opposing open or slotted sections 116 a, 116 b. A distal surface of head section 110 is formed onto or integral with a proximal end of mesh retention section 120.

Mesh retention section 120 of anchor 100 extends from and between a distal end or surface of head section 110 and a proximal end of tissue-snaring section 130. Mesh retention section 120 functions to lock, anchor or otherwise retain a surgical mesh (not shown) on to anchor 100 when anchor 100 is screwed into the mesh to a depth past a proximal-most segment 138 of tissue-snaring thread 132 of tissue-snaring section 130. This is achieved because there is no thread located in mesh retention section 120 that would allow anchor 100 to be unscrewed or backed out from the mesh.

Mesh retention section 120 has a cylindrical or conical transverse cross-sectional profile. Mesh retention section 120 includes a transverse radial dimension, relative to a central longitudinal axis of anchor 100, that is smaller than a transverse radial dimension of head section 110, and smaller than a transverse radial dimension of proximal-most segment 138 of tissue-snaring thread 138.

Threaded tissue-snaring section 130 of anchor 100 includes helical threads 132 formed onto a tapered truncated body section 134. A distal point or tip 136 defines the terminus of the distal most tissue-snaring thread 132.

As seen in FIG. 4, body section 134 of tissue-snaring section 130 is tapered, i.e., becoming smaller toward the distal end of threaded tissue-snaring section 130, and terminates or truncates to a distal truncation point “TP”, prior to reaching an apex or tip of anchor 100. Body section 134 includes a concave taper such that, for a given length, a minimum diameter body section 134 is defined upon truncation thereof which is approximately less than 0.01 inches.

Anchor 100 includes a transverse dimension “D”, of a distal-most thread in the threaded tissue-snaring section 130 which is as large as design constraints will allow or approximately greater than 0.040 inches. In accordance with the present disclosure, a small truncated body diameter and a large value of “D” minimizes tissue indentation. The tissue-snaring threads 132 terminate at distal tip 136, which is distal of the truncation point “TP” of body section 134.

By providing a distal tip 136 extending distally of truncation point “TP” of tissue-snaring section 130, a penetration of the mesh, by anchor 100, is eased; and an indentation of the mesh into relatively soft tissue, by anchor 100, is minimized, as compared to an anchor having a non-truncated body with tapered threads.

For a given force applied to a surgical mesh by the surgeon, exerting a distal force on a tack applier the larger the dimension “D” of anchor 100 the less the pressure exerted to cause indentation of an underlying tissue and surgical mesh.

Anchor 100 is non-cannulated and is constructed from a suitable bioabsorbable material, such as, polylactide, polyglycolide. Anchor 100 is formed from a proprietary biocompatible co-polymer (Lactomer USS L1, Boehringer Ingelheim LR 704 S, or Boehringer Ingelheim LG-857).

Turning now to FIGS. 5-49, an endoscopic surgical device, in the form of an endoscopic surgical tack applier or tacker, is shown generally as 200. Tack applier 200 includes a handle assembly 210, and an endoscopic assembly 230 extending from handle assembly 210 and configured to store and selectively release or fire a plurality of anchors 100 therefrom and into mesh “M” overlying tissue “T”. (see FIG. 50).

As seen in FIGS. 5-14, handle assembly 210 includes a handle housing 212 formed from a first half-section 212 a and a second half section 212 b joined to one another. First half-section 212 a and second half section 212 b of handle housing 212 may be joined to one another using know methods by those of skill in the art, including and not limited to welding, fasteners (i.e., screws) and the like.

Handle assembly 210 includes a trigger 214 pivotably connected to handle housing 212, at a location remote from endoscopic assembly 230. Handle assembly 210 includes a biasing member 222 configured for maintaining trigger 214 in an extended or un-actuated position. Biasing member 222 is also configured to have a spring constant sufficient to return trigger 214 to the un-actuated position.

Trigger 214 defines a gear rack 214 a formed thereon at a location opposite or remote from the pivot of trigger 214. Gear rack 214 a of trigger 214 is configured for operative engagement with a pinion gear 216 rotatably supported in handle housing 212. Gear rack 214 a and pinion gear 216 are dimensioned such that one complete squeeze of trigger 214 results in one complete revolution of pinion gear 216.

As seen in FIGS. 7, 9, 11, 47 and 48, handle assembly 210 includes a timing system 270 associated therewith. Timing system 270 includes a raceway 214 c formed in a surface of trigger 214. Raceway 214 c defines a plurality of steps 214 d therealong, and a home position 214 e (FIGS. 9 and 48) formed therein.

Timing system 270 includes a resilient and deflectable arm 272 having a first end 272 a operative connected or disposed in raceway 214 c and that is in contact with steps 214 d as first end 272 a thereof travels around raceway 214 c. Deflectable arm 272 further includes a second end 272 b that is connected to handle housing half 212 b. Raceway 214 c of trigger is configured such that when trigger 214 is in a fully un-actuated position, first end 272 a of deflectable arm 272 is located in the home position 214 e of raceway 214 c.

In operation, as seen in FIGS. 47 and 48, when trigger 214 is in the fully un-actuated position, as mentioned above, first end 272 a of deflectable arm 272 is located in the home position 214 e of raceway 214 c. Then, as trigger 214 is actuated, first end 272 a of arm 272 rides through and/or along raceway 214 c (in a single direction) formed in trigger 214. First end 272 a of arm 272 moves uni-directionally over steps 214 d of raceway 214 c, such that, if trigger 214 is released after a partial squeeze, first end 272 a of arm 272 can not move backwards or in reverse through raceway 214 c due to steps 214 d and trigger 214 can not return to the fully un-actuated position.

As so configured and operable, and as will be described in detail below, end effector or SULU 300 may only be removed and replaced when trigger 214 is in the fully un-actuated, home and locked position. As such, an end effector or SULU 300 can not be removed or replaced or loaded on/in handle assembly 200 while trigger 214 is in a short-stroked condition (i.e., partially actuated).

Additionally, as first end 272 a of arm 272 moves over steps 214 d of raceway 214 c, first end 272 a of arm 272 snaps over steps 214 d and creates an audible sound/click and/or a tactile vibration for the surgeon. It is contemplated that timing system 270 includes sufficient steps 214 d in raceway 214 c so as to create an audible/tactile indication when trigger 214 is in a fully un-actuated home or lockout position (for loading/unloading end effector or SULU 300); after trigger 214 has been fully actuated to fire a singe surgical anchor 100; and when trigger 214 is reset to the fully un-actuated home position (wherein trigger 214 may once again be locked) and ready to fire another surgical anchor 100.

As seen in FIGS. 7 and 9-12, handle assembly 210 includes a pinion gear 216 having an arm 216 a extending radially therefrom and a cam or ramp 216 b extending/projecting from arm 216 a. Cam 216 b includes a front end 216 c having a height defining a shoulder, and tail end 216 d tapering into arm 216 a.

As seen in FIGS. 7-11 and 14, handle assembly 210 further includes a first bevel gear 218, in the form of a crown gear, operatively engaged/associated with pinion gear 216. First bevel gear 218 defines an arcuate slot 218 a formed in a face 218 d thereof for selectively receiving and engaging cam 216 b of pinion gear 216. Slot 218 a includes a front end wall 218 b configured to engage front end 216 c of cam 216 b of pinion gear 216, and tapers along a length thereof to be flush with face 218 d of first bevel gear 218.

In use, as trigger 214 is actuated, gear rack 214 a thereof is moved in an axial or arcuate first direction to thereby rotate pinion gear 216, meshed therewith, in a first direction. As pinion gear 216 is rotated in the first direction, front end 216 c of cam 216 b of pinion gear 216 is rotated in a first direction until front end 216 c engages or contacts front end wall 218 a of slot 218 b of first bevel gear 218. After front end 216 c of pinion gear 216 engages or contacts front end wall 218 a of slot 218 b of first bevel gear 218, continued rotation of pinion gear 216 in the first direction results in concomitant rotation of first bevel gear 218 in a first direction. At this point, first bevel gear 218 continues to rotate in the first direction so long as trigger 214 is being actuated and gear rack 214 a is moving in the first direction.

When actuation of trigger 214 is stopped, either prior to complete actuation or following complete actuation, rotation of first bevel gear 218, in the first direction, is also stopped.

Upon the completion of a partial or complete actuation of trigger 214 and a release thereof, gear rack 214 a thereof is moved in a second direction (opposite the first direction) to thereby rotate pinion gear 216 in a second direction. As pinion gear 216 is rotated in the second direction rear end 216 d of cam 216 b thereof slides along slot 218 b of first bevel gear 218, and if the rotation in the second direction is sufficient, slides out of slot 218 b of bevel gear 218 and along face 218 d of first bevel gear 218.

If trigger 214 was fully actuated, a complete release of trigger 214, and return to the fully un-actuated position, wherein first end 272 a of deflectable arm 272 is returned to the home position 214 e of raceway 214 c, will result in pinion gear 216 making a complete revolution, in the second direction, until front end 216 c of cam 216 b of pinion gear 216 clears front end wall 218 a of slot 218 b of first bevel gear 218 to thereby re-enter slot 218 b of first bevel gear 218.

As seen in FIGS. 8 and 11, handle assembly 210 of tack applier 200 is provided with a ratchet mechanism 260 which is configured to inhibit or prevent inner shaft assembly 238 from backing-out or reversing after anchor 100 has been at least partially driven into tissue. Ratchet mechanism 260 includes, as seen in FIGS. 8 and 11, a series of ratchet teeth 218 f formed on a rear surface 218 e of first bevel gear 218.

Ratchet mechanism 260 further includes a spring clip 262 secured within handle assembly 210. Spring clip 262 includes a resilient finger 262 a configured for engagement with ratchet teeth 218 f formed on rear surface 218 e of first bevel gear 218.

Each ratchet tooth 218 f includes a shallow angled side and a steep angled side. In this manner, resilient finger 262 a of spring clip 262 engages with ratchet teeth 218 f in such a manner that as first bevel gear 218 is rotated, in a first direction resilient, finger 262 a of spring clip 262 cams over the shallow angled side of ratchet teeth 218 f Also, if first bevel gear 218 is rotated in a second direction (opposite to the first direction), resilient finger 262 a of spring clip 262 stops against the steep angled side of ratchet teeth 218 f thereby preventing or inhibiting first bevel gear 218 from rotating in the second direction. As such, any reverse rotation or “backing-out” of anchor 100 or inner shaft assembly 238 (tending to cause first bevel gear 218 to rotate in the second direction), during a driving or firing stroke, is inhibited or prevented.

In an alternate embodiment, first bevel gear 218 may be maintained from rotating in the second or opposite direction, upon the rotation of pinion gear 216, in the second direction, due to a coefficient of static friction between first bevel gear 218 and a surface of handle housing 212, or a coefficient of static friction between first bevel gear 218 and a pin upon which first bevel gear 218 is supported, which will tend to maintain first bevel gear 218 stationary. Such a configuration and assembly functions as a ratchet mechanism or the like for tack applier 200.

With reference to FIGS. 6, 7 and 9-11, handle assembly 210 further includes a second or pinion-bevel gear 220 having gear teeth 220 a operatively engaged or meshed with gear teeth 218 c formed at the outer radial edge and on front face 218 d of first bevel gear 218. Pinion-bevel gear 220 is secured to a proximal end of an inner shaft assembly 238 of anchor retaining/advancing assembly 230 (see FIG. 15). In an embodiment, pinion-bevel gear 220 is keyed to proximal end of inner shaft assembly 238 of anchor retaining/advancing assembly 230 such that inner shaft assembly 238 is capable of axial displacement relative to pinion-bevel gear 220 and is prevented from rotation relative to pinion-bevel gear 220.

In use, as described above, upon squeezing of trigger 214, gear rack 214 a thereof causes pinion gear 216 to rotate in the first direction. Rotation of pinion gear 216, in the first direction, results in rotation of first bevel gear 218 in the first direction and, in turn, rotation of pinion-bevel gear 220 in a first direction. As pinion-bevel gear 220 is rotated in the first direction, pinion-bevel gear 220 transmits the rotation to inner shaft assembly 238 of anchor retaining/advancing assembly 230.

As seen in FIGS. 5-11 and 13, handle assembly 210 includes a button 240 supported on handle housing 212 and being configured to permit and inhibit actuation of trigger 214, and for effectuating a loading/retention and a release/removal of an end effector 300 to anchor retaining/advancing assembly 230. Button 240 includes a pin 240 a slidably supported in handle housing 212. Pin 240 a is oriented in a direction orthogonal to the longitudinal axis of anchor retaining/advancing assembly 230. As seen in FIGS. 38-41, pin 240 a has a length such that when button 240 is in a first position, a first end of pin 240 a extends from a first side of handle housing 212, and when button 240 is in a second position, a second end of pin 240 a extends from a second side of handle housing 212.

As seen in FIGS. 13 and 38-41, button 240 includes a plate 240 b supported on and connected to pin 240 a. Plate 240 b defines an elongate slot 240 c therein, through which a stem 220 a of pinion-bevel gear 220 extends. Elongate slot 240 c of plate 240 b defines a major axis which is parallel relative to a longitudinal axis of pin 240 a. In use, as pin 240 a is moved between the first position and the second position, plate 240 b is moved between respective first and second positions.

Button 240 includes a first detent or recess 240 d defined in plate 240 b that is engaged by a biasing member 242 when button 240 is in the first position, and a second detent or recess 240 e defined in plate 240 b that is engaged by biasing member 242 when button 240 is in the second position. The engagement of biasing member 242 in either first detent 240 d or second detent 240 e of button 240 functions to help maintain button 240 in either the first or second position.

In an embodiment, biasing member 242 may be in the form of a plunger spring, and, as seen in FIGS. 33 and 42, in another embodiment, biasing member 242 may be in the form of a torsion spring. A torsion spring is contemplated over a plunger spring in order to reduce overall costs of surgical tacker 200.

As seen in FIGS. 8, 13, 33 and 38-42, button 240 includes a first wall 240 f extending from plate 240 b, and a second wall 240 g extending from plate 240 b. In use, when button 240 is in the first position, first wall 240 f thereof blocks or inhibits movement of a load/release slider 244, and when button 240 is in the second position, first wall 240 f thereof permits movement of load/release slider 244. Similarly, in use, when button 240 is in the second position (only achievable when trigger 214 is in a fully un-actuated or home position), second wall 240 g thereof blocks or inhibits actuation of trigger 214 by second wall 240 g extending into a notch 214 b of trigger 214; and when button 240 is in the first position, second wall 240 f is clear of notch 214 b of trigger 214 to permit actuation of trigger 214.

As seen in FIGS. 5-11, 13 and 38-42, handle assembly 210 includes a load/release slider 244 slidably supported on handle housing 212 and being configured to effectuate a loading/retention and a release/removal of an end effector 300, in the form of a single use loading unit (SULU) or disposable loading unit (DLU), as will be discussed in greater detail below. Slider 244 includes a first stem 244 a extending proximally therefrom and toward button 240. Specifically, first stem 244 a of slider 244 is in axial registration with first wall 240 f extending from plate 240 b of button 240 when button 240 is in the first position (see FIG. 39), and out of axial registration with first wall 240 f of button 240 when button 240 is in the second position (see FIG. 41).

Slider 244 further includes a second stem 244 b extending therefrom in a direction toward inner shaft assembly 238 of anchor retaining/advancing assembly 230. As seen in FIGS. 15 and 42, inner shaft assembly 238 supports a pair of axially spaced apart radial flanges 238 d, 238 e which bookend (i.e., one flange being distal and one flange being proximal of second stem 244 b).

In use, as seen in FIGS. 41 and 42, when button 240 is in the second position (wherein trigger 214 is locked in the fully un-actuated position) such that first stem 244 a of slider 244 is out of axial registration with first wall 240 f of button 240, slider 244 is free to move between a first or distal position and a second or proximal position. As slider 244 is moved from the first position to the second position thereof, second stem 244 b of slider 244 exerts a force on proximal radial flange 238 d of inner shaft assembly 238 to urge inner shaft assembly 238 proximally from a respective first position to a respective second position. It follows that as slider 244 is moved from the second position to the first position thereof, second stem 244 b of slider 244 exerts a force on distal radial flange 238 e of inner shaft assembly 238 to urge inner shaft assembly 238 distally from the respective second position to the respective first position.

In accordance with the present disclosure, as inner shaft assembly 238 is moved between the respective first and second positions thereof, inner shaft assembly 238, being connected to coupling member 238 c results in connecting member 238 c also moving between a respective first position and a respective second position.

Slider 244 may be biased to the first or distal position by a biasing member 245 (see FIG. 42).

As seen in FIGS. 5, 6, 8, 15, 17, 33-35 and 45, handle assembly 210 includes an articulation knob 246 rotatably supported on handle housing 212. Articulation knob 246 defines an inner helical thread 246 a. Inner helical thread 246 a meshingly receives or engages an outer thread 247 a of a connection nut 247 that is non-rotatably connected to proximal tube portion 234 a of inner tube assembly 234 of anchor retaining/advancing assembly 230. Connection nut 247 may be keyed to articulation knob 246 so as to not rotate relative to articulation knob 246 as articulation knob 246 is rotated. Alternatively, the surgeon may manually grip a distal end of connection nut 247 (which is projecting/extending distally of articulation knob 246) as articulation knob 246 is rotated.

In use, as seen in FIGS. 45 and 46, with connection nut 247 retained against rotation about the longitudinal axis, as articulation knob 246 is rotated in a first direction, connection nut 247 travels along inner helical thread 246 a of articulation knob 246 to cause inner articulation tube assembly 234 to move in a respective first or distal axial direction; and as articulation knob 246 is rotated in a second direction, connection nut 247 travels along inner helical thread 246 a of articulation knob 246 to cause inner articulation tube assembly 234 to move in a respective second or proximal axial direction. In accordance with the present disclosure, rotation of articulation knob 246 in the respective first and second directions results in the articulating and straightening of anchor retaining/advancing assembly 230, as will be discussed in greater detail below.

Turning now to FIGS. 15, 16, 32, 33 and 42-46, as seen therein, endoscopic assembly 230 includes an outer tube 231, an outer support tube assembly 232 disposed within outer tube 231, an inner articulation tube assembly 234, and an inner shaft assembly 238. Outer support tube assembly 232 includes a proximal support tube portion 232 a secured to and extending from handle housing 212, and a distal support tube portion 232 b pivotally connected to proximal tube portion 232 a by a pivot pin 232 c (see FIGS. 15 and 16) at an articulation joint 250.

As seen in FIGS. 15, 16, 43 and 44, distal support tube portion 232 b supports a ball detent 233 in an outer surface thereof. Ball detent 233 functions to selectively secure and retain end effector 300 to endoscopic assembly 230. In use, as will be discussed in greater detail below, as seen in FIGS. 37 and 42, ball detent 233 is acted on by an outer camming surface/relief 238 c ₁ of coupling member 238 which acts on ball detent 233 to move ball detent 233 radially outward when inner shaft assembly 238 is a distal position.

Inner articulation tube assembly 234 includes a proximal tube portion 234 a concentrically and slidably disposed within proximal tube portion 232 a of outer support tube assembly 232. As seen in FIG. 33, proximal end 234 b of proximal tube portion 234 a is non-rotatably connected to connection nut 247.

Inner articulation tube assembly 234 includes an articulation link 235 having a proximal end 235 a pivotally connected to a distal end of proximal tube portion 234 a, and a distal end 235 b pivotally connected to distal tube portion 232 b of outer support tube assembly 232. Distal end 235 b of articulation link 235 is pivotally connected to distal tube portion 232 b of outer support tube assembly 232 at a location offset from the central longitudinal axis of anchor retaining/advancing assembly 230, in a direction substantially away from pivot pin 232 c of articulation joint 250.

In operation, as seen in FIGS. 45 and 46, upon an axial translation of proximal tube portion 234 a, for example in a proximal direction, due to a rotation of articulation knob 246 and proximal axial movement of connection nut 247 as described above, proximal tube portion 234 a acts or pulls on articulation link 235 to cause articulation link 235 to translate in a proximal direction. As articulation link 235 is axially translated in a proximal direction, articulation link 235 acts or pulls on distal tube portion 232 b of outer support tube assembly 232 to cause distal tube portion 232 b to pivot about a pivot axis of pivot pin 232 c. As distal tube portion 232 b is pivoted, distal tube portion 232 b causes end effector 300 to be moved to an articulated orientation relative to the central longitudinal axis of anchor retaining/advancing assembly 230.

It follows that upon an axial translation of proximal tube portion 234 a in a distal direction, due to a distal movement of slider 244, as described above, proximal tube portion 234 a acts or pushes on articulation link 235 to cause articulation link 235 to translate in a distal direction. As articulation link 235 is axially translated in a distal direction, articulation link 235 acts or pushes on distal tube portion 232 b of outer support tube assembly 232 to cause distal tube portion 232 b to pivot about a pivot axis of pivot pin 232 c. As distal tube portion 232 b is pivoted, distal tube portion 232 b causes end effector 300 to be returned to a non-articulated orientation relative to the central longitudinal axis of anchor retaining/advancing assembly 230.

In accordance with the present disclosure, distal tube portion 232 b of anchor retaining/advancing assembly 230 is pivotable in a single direction relative to proximal tube portion 232 a of anchor retaining/advancing assembly 230.

With reference to FIGS. 15, 19, 32, 33 and 35-46, inner actuation shaft assembly 238 includes a proximal rigid shaft portion 238 a, a distal flexible shaft portion 238 b non-rotatably connected to and extending from a distal end of proximal rigid shaft portion 238 a, and a coupling member 238 c non-rotatably connected to a distal end of distal flexible shaft portion 238 b. Second or pinion-bevel gear 220 is non-rotatably connected to a proximal end of proximal rigid shaft portion 238 a of inner actuation shaft assembly 238. Inner actuation shaft assembly 238 is configured such that distal flexible shaft portion 238 b extends across and beyond articulation joint 250.

Desirably, coupling member 238 c is rotatably and slidably supported in distal tube portion 232 b of outer support tube assembly 232 so as to accommodate and/or account for variations in length of distal flexible shaft portion 238 b when distal flexible shaft portion 238 b is in a flexed condition. Coupling member 238 c is substantially tongue shaped and extends in a distal direction distally from distal tube portion 232 b of outer support tube assembly 232. Coupling member 238 c is configured for non-rotatable connection to inner tube 338 of end effector 300, as will be discussed in greater detail below.

Distal flexible shaft portion 238 b is fabricated from a torsionally stiff and flexible material, such as, for example, stainless steel.

It is contemplated that distal flexible shaft portion 238 b may have an outer diameter of about 0.08′. Meanwhile, anchor retaining/advancing assembly 230 has an outer diameter of about 0.22′. A ratio of the outer diameter of distal flexible shaft portion 238 b to the outer diameter of anchor retaining/advancing assembly 230 is about 2.8.

Inner actuation shaft assembly 238 is configured to perform at least a pair of functions, a first function relating to the securing and release of an end effector or SULU 300 to distal tube portion 232 b of outer support tube assembly 232 upon an axial translation thereof, and a second function relating to the firing of fasteners 100 from end effector or SULU 300 when end effector or SULU 300 is coupled to distal tube portion 232 b of outer support tube assembly 232 upon a rotation thereof.

In order to prepare surgical tacker 200 for receipt of end effector or SULU 300 or to replace a spent end effector or SULU 300 with a new end effector or SULU 300, as seen in FIGS. 38-44, and as mentioned above, trigger 214 must be in a fully un-actuated position. With trigger 214 in the fully un-actuated position, button 240 is moved from the first position to the second position (as described above) such that trigger 214 is prevented from actuation and such that slider 244 is free to move. With button 240 in the second position, slider 244 is moved from the first position to the second position (as described above). As slider 244 is moved to the second position, second stem 244 b of slider 244 exerts a force on proximal radial flange 238 d of inner shaft assembly 238 to urge inner shaft assembly 238, and in turn coupling member 238 a thereof, proximally from a respective first position to a respective second position. As coupling member 238 a is moved from the first position to the second position, ball detent 233 is free to drop or move radially inward of outer tube 231 as outer camming surface/relief 238 c ₁ of coupling member 238 is moved into axial registration with ball detent 233. With ball detent 233 free to drop or move radially inward, end effector or SULU 300 may be fully coupled to distal support tube portion 232 b of anchor retaining/advancing assembly 230.

Once again, as mentioned above, as so configured and operable, end effector or SULU 300 may only be removed and replaced when trigger 214 is in the fully un-actuated, home and locked position. As such, end effector or SULU 300 can not be removed or replaced or loaded while trigger 214 is in a short-stroked condition (i.e., partially actuated).

With a new end effector or SULU 300 fully coupled to distal support tube portion 232 b of anchor retaining/advancing assembly 230, slider 244 is moved from the second position to the first position to secure or lock end effector or SULU 300 to distal support tube portion 232 b of anchor retaining/advancing assembly 230. In particular, as slider 244 is moved to the first position, second stem 244 b of slider 244 exerts a force on distal radial flange 238 e of inner shaft assembly 238 to urge inner shaft assembly 238, and in turn coupling member 238 a thereof, distally from second position to first position. As coupling member 238 a is moved from the second position to the first position, ball detent 233 is urged by outer camming surface/relief 238 c ₁ of coupling member 238 to move ball detent 233 radially outward. As ball detent 233 moves radially outward a portion of ball detent 233 enters an aperture 332 c of end effector or SULU 300 to secure end effector or SULU 300 to distal support tube portion 232 b of anchor retaining/advancing assembly 230. With end effector or SULU 300 coupled to distal support tube portion 232 b of anchor retaining/advancing assembly 230, button 240 is moved from the second position to the first position (as described above) such that slider 244 is prevented from actuation and such that trigger 214 is free to move.

Turning now to FIGS. 5, 6, 15, 17-27, 32, 36, 37, 43, 44 and 46, end effector 300, in the form of a SULU or DLU, is shown and will be described herein. End effector 300, as mentioned above, is selectively connectable to distal tube portion 232 b of outer support tube assembly 232.

End effector or SULU 300 includes an outer tube 332 defining a lumen 332 a therethrough and being configured and dimensioned (i.e., substantially rectangular or dog bone shaped) to receive distal tube portion 232 b of outer support tube assembly 232 and coupling member 238 c of anchor retaining/advancing assembly 230 therein. As seen in FIG. 19, outer tube 332 defines a proximal key slot 332 b for engagement with a key 232 c formed in distal tube portion 232 b of outer support tube assembly 232. In use, when end effector or SULU 300 is connected to distal tube portion 232 b of outer support tube assembly 232 key slot 332 b and key 232 c engage with one another to properly align end effector or SULU 300 and anchor retaining/advancing assembly 230 to one another.

End effector or SULU 300 further includes a spiral or coil 336 fixedly disposed within a distal portion of outer tube 332. A pair of axially spaced apart retention rings 337 a, 337 b are also fixedly disposed within outer tube 332 at a location proximal of coil 336.

End effector or SULU 300 also includes an inner tube 338 rotatably disposed within coil 336. Inner tube 338 defines a lumen therethrough, and includes a proximal end portion 338 a and a splined distal end portion 338 b. Proximal end portion 338 a of inner tube 338 is configured and dimensioned to slidably receive coupling member 238 c of anchor retaining/advancing assembly 230 therein. Inner tube 338 includes a plurality of retention tabs 338 c projecting radially outward therefrom and which snap beyond one of the pair of retention rings 337 a, 337 b, when inner tube 338 is assembled with outer tube 332. In this manner, outer tube 332 and inner tube 338 are axially fixed and yet rotatable relative to one another.

Distal end portion 338 a of inner tube 338 is slotted, defining a pair of tines 338 a ₁ and a pair of channels 338 a ₂. Distal end portion 338 a of inner tube 338 is capable of accepting a plurality of anchors 100 within inner tube 338. In particular, anchors 100 are loaded into end effector or SULU 300 such that the pair of opposing threaded sections 112 a, 112 b of anchors 100 extend through respective channels 338 a ₂ of distal end portion 338 a of inner tube 338 and are slidably disposed within the groove of coil 336, and the pair of tines 338 a ₁ of distal end portion 338 a of inner tube 338 are disposed within the pair of slotted sections 116 a, 116 b of anchors 100. Each anchor 100 is loaded into end effector or SULU 300 such that adjacent anchors 100 are not in contact with one another so as to not damage distal tips 136.

In use, as inner tube 338 is rotated, about its longitudinal axis, with respect to coil 336, the pair of tines 338 a ₁ of inner tube 338 transmit the rotation to anchors 100 and advance anchors 100 distally owing to head threads 114 a, 114 b of anchors 100 engaging with coil 336.

In an operation of surgical tacker 200, as seen in FIG. 49, with end effector or SULU 300 operatively connected to distal tube portion 232 b of outer support tube assembly 232 of anchor retaining/advancing assembly 230, as inner shaft assembly 238 is rotated due to an actuation of trigger 214, as described above, said rotation is transmitted to inner tube 338 of end effector or SULU 300 via coupling member 238 c of anchor retaining/advancing assembly 230. Again, as inner tube 338 is rotated, about its longitudinal axis, with respect to coil 336, the pair of tines 338 a ₁ of inner tube 338 transmit the rotation to the entire stack of anchors 100 and advance the entire stack of anchors 100 distally, owing to head threads 114 a, 114 b of anchors 100 engaging with coil 336.

In accordance with the present disclosure, the components of surgical tacker 200, and anchors 100 are dimensioned such that a single complete and full actuation of trigger 214 results in a firing of a singe anchor 100 (i.e., the distal-most anchor of the stack of anchors 100 loaded in end effector or SULU 300) from end effector or SULU 300.

Surgical tacker 200 may be repeatedly fired to fire anchors from end effector 300 until the surgical procedure is complete or until end effector or SULU 300 is spent of anchors 100. If end effector or SULU 300 is spent of anchors 100, and if additional anchors 100 are required to complete the surgical procedure, spent end effector or SULU 300 may be replaced with a new (i.e., loaded with anchors 100) end effector or SULU 300.

As seen in FIGS. 40-44, in order to replace spent end effector or SULU 300 with a new end effector or SULU 300, with trigger 214 in the fully un-actuated position (as described above, the surgeon actuates or slides button 244 to release the spent end effector or SULU 300, decouples end effector or SULU 300 from anchor retaining/advancing assembly 230, loads or connects a new end effector or SULU 300 to anchor retaining/advancing assembly 230 (by fitting proximal end portion 338 a of inner tube 338 over coupling member 238 c of anchor retaining/advancing assembly 230), and releases button 244 to retain the new end effector or SULU 300 on anchor retaining/advancing assembly 230. Since trigger 214 is in the fully un-actuated position with the loading of a new end effector or SULU 300, timing system 270 is re-set such that each fully actuation of trigger 214 results in the firing of a single anchor 100.

It is contemplated that end effector or SULU 300 may only be connected or coupled to distal tube portion 232 b of outer support tube assembly 232 of anchor retaining/advancing assembly 230 while anchor retaining/advancing assembly 230 is in the non-articulated condition.

In accordance with the present disclosure, with end effector or SULU 300 connected or coupled to distal tube portion 232 b of outer support tube assembly 232 of anchor retaining/advancing assembly 230, articulation knob 246 is rotated or held in place such that anchor retaining/advancing assembly 230 is in a non-articulated condition.

Additionally, in accordance with the present disclosure, with end effector or SULU 300 connected or coupled to distal tube portion 232 b of outer support tube assembly 232 of anchor retaining/advancing assembly 230, end effector or SULU 300 is introduced into a target surgical site while in the non-articulated condition. With end effector or SULU 300 disposed within the target surgical site, the surgeon may remotely articulate end effector or SULU 300 relative to anchor retaining/advancing assembly 230. Specifically, as seen in FIGS. 45 and 46, the surgeon rotates articulation knob 246 to axially displace connection nut 247 and proximal tube portion 234 a of inner articulation tube assembly 234 to move in the proximal axial direction. As proximal tube portion 234 a is moved in the proximal axial direction, proximal tube portion 234 a acts or pulls on articulation link 235 to cause articulation link 235 to translate in a proximal direction. As articulation link 235 is axially translated in a proximal direction, articulation link 235 acts or pulls on distal tube portion 232 b of outer support tube assembly 232 to cause distal tube portion 232 b to pivot about a pivot axis of pivot pin 232 c. As distal tube portion 232 b is pivoted, distal tube portion 232 b causes end effector 300 to be moved to an articulated orientation relative to the central longitudinal axis of anchor retaining/advancing assembly 230.

Turning now to FIGS. 28-30, in accordance with the present disclosure, a shipping wedge 400 may be provided which is configured and dimensioned to releasably connect to end effector or SULU 300, to inhibit premature rotation of inner tube 338 of end effector or SULU 300, and to help facilitate loading/unloading of end effector or SULU 300 to/from distal tube portion 232 b of anchor retaining/advancing assembly 230.

Shipping wedge 400 includes a handle portion 402 and a coupling member 404 integrally formed with or secured to handle portion 402. Coupling member 404 is substantially tubular having a substantially C-shaped transverse cross-sectional profile. Coupling member 404 defines a longitudinally extending opening or gap 404 a therealong. Handle portion 404 defines a longitudinal axis that is substantially orthogonal to the longitudinal axis of coupling member 404.

Coupling member 404 has a diameter sufficient to accommodate end effector or SULU 300 therein and along. Also, gap 404 a of coupling member 404 has a dimension, which together with the materials of construction of at least coupling member 404, allows for coupling member 404 to be snapped-over end effector or SULU 300. It is envisioned that at least coupling member 404 may be fabricated from a polymeric or other substantially rigid and resilient material.

As seen in FIGS. 29 and 30, shipping wedge 400 includes a wedge, spike or nub 406 extending radially into coupling member 404. In particular, wedge 406 extends or projects in a direction substantially parallel to the longitudinal axis of handle portion 402. Wedge 406 has a length sufficient such that, when shipping wedge 400 is attached to end effector or SULU 300, wedge 406 enters an aperture 332 d (see FIGS. 19, 22, 29 and 30) formed in outer tube 332 of end effector or SULU 300.

Additionally, when shipping wedge 400 is attached to end effector or SULU 300, wedge 406 extends to be in close proximity to or in contact with proximal end portion 338 a of inner tube 338 of end effector or SULU 300. By extending this amount, wedge 406 inhibits rotation of inner tube 338 relative to outer tube 332 by blocking or contacting proximal end portion 338 a of inner tube 338 if inner tube 338 experiences any rotation relative to outer tube 332.

Also, when shipping wedge 400 is attached to end effector or SULU 300, and with wedge 406 blocking rotation of inner tube 338 of end effector or SULU 300, shipping wedge 400 facilitates a loading/unloading of end effector or SULU 300 to/from distal tube portion 232 b of anchor retaining/advancing assembly 230. During loading of end effector or SULU 300 to distal tube portion 232 b of anchor retaining/advancing assembly 230, shipping wedge 400 functions to fix an angular orientation of proximal end portion 338 a of inner tube 338 for proper alignment and orientation with coupling member 238 c of anchor retaining/advancing assembly 230.

In accordance with the present disclosure, it is contemplated that handle assembly 100 may be replaced by an electromechanical control module configured and adapted to drive the flexible drive cables to fire or actuate the surgical device. The electromechanical control module may include at least one microprocessor, at least one drive motor controllable by the at least one microprocessor, and a source of power for energizing the at least one microprocessor and the at least one drive motor.

Additionally, while the present disclosure describes a surgical tacker that includes a timing system, as described above and shown herein,

It will be understood that various modifications may be made to the embodiments disclosed herein. For example, the length of the linear row of staples or fasteners may be modified to meet the requirements of a particular surgical procedure. Thus, the length of the linear row of staples and/or fasteners within a staple cartridge assembly may be varied accordingly. Therefore, the above description should not be construed as limiting, but merely as exemplifications of various embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the claims appended thereto. 

What is claimed is:
 1. An endoscopic surgical device configured to fire a surgical anchor into target tissue, the endoscopic surgical device comprising; a handle assembly including: a handle housing; a trigger defining a gear rack, the trigger operatively connected to the handle housing and movable between a fully un-actuated position and a fully actuated position; a pinion gear defining a plurality of teeth operatively engageable with the gear rack of the trigger, the pinion gear including an arm extending radially therefrom that defines a camming feature; a bevel gear defining a first surface including a plurality of teeth and a camming feature selectively engageable with the camming feature of the pinion gear; a drive mechanism actuatable by the trigger; a timing system associating the trigger with the drive mechanism, wherein the timing system includes: a raceway formed in a surface of the trigger, the raceway defining steps along a length thereof; and a deflectable arm having a first end disposed within the raceway and operatively associated with the steps thereof, and a second end connected to the handle housing; and an endoscopic assembly including a proximal end portion extending from the handle assembly and a distal end portion configured to support an end effector, wherein actuation of the trigger causes movement of the gear rack in a first direction, which causes rotation of the pinion gear in a first direction, and wherein rotation of the pinion gear in the first direction causes the camming feature of the pinion gear to selectively engage the camming feature of the bevel gear to cause a corresponding rotation of the bevel gear in a first direction, and wherein the timing system maintains a timing of an actuation stroke of the trigger with an actuation of the drive mechanism to fire a single surgical anchor upon a single stroke of the trigger from the fully un-actuated position, to the fully actuated position, to the fully un-actuated position.
 2. The endoscopic surgical device according to claim 1, wherein a release of the trigger from the fully actuated position causes the gear rack to move in a second direction opposed from the first direction of the gear rack, which causes the pinion gear to rotate in a second direction opposed from the first direction of pinion gear and causes the camming feature of the pinion gear to disengage from the camming feature of the bevel gear.
 3. The endoscopic surgical device according to claim 1, wherein the camming feature of the pinion gear is a ramp including a first end portion defining a shoulder, and a second end portion that tapers into the arm.
 4. The endoscopic surgical device according to claim 3, wherein the camming feature of the bevel gear is a slot having an arcuate configuration, the slot defining a step therein having a first end portion configured to engage the first end portion of the ramp of the pinion gear, and a second end portion that tapers into the first surface of the bevel gear such that the second end portion of the step is flush with the first surface of the bevel gear.
 5. The endoscopic surgical device according to claim 1, wherein the bevel gear defines a second surface having a plurality of ratchet teeth.
 6. The endoscopic surgical device according to claim 5, further comprising a spring clip defining a resilient finger that is operatively engaged with the plurality of ratchet teeth of the bevel gear, the resilient finger of the spring clip configured to prevent rotation of the bevel gear from the first direction into a second opposing direction.
 7. The endoscopic surgical device according to claim 1, wherein the first end of the deflectable arm rides through the raceway in a single direction upon the actuation of the trigger.
 8. The endoscopic surgical device according to claim 1, wherein the raceway defines a home position for the first end of the deflectable arm when the trigger is in the fully un-actuated position, and wherein actuation of the trigger causes the first end of the deflectable arm to move from the home position within the raceway.
 9. The endoscopic surgical device according to claim 8, wherein movement of the trigger from the fully actuated position to the fully un-actuated position causes the gear rack of the trigger to move in a second direction opposed from the first direction and causes the first end of the deflectable arm to return to the home position within the raceway.
 10. The endoscopic surgical device according to claim 8, wherein movement of the trigger from the fully actuated position to the fully un-actuated position causes the pinion gear to rotate in a second opposing direction from the first direction and causes the first end of the deflectable arm to return to the home position within the raceway.
 11. The endoscopic surgical device according to claim 1, wherein movement of the first end of the deflectable arm over the steps of the raceway provides at least one of an audible and a tactile feedback.
 12. The endoscopic surgical device according to claim 1, wherein the endoscopic assembly includes a rotatable inner actuation shaft extending from the handle assembly and into the distal end portion of the endoscopic assembly, the rotatable inner actuation shaft being connected to the drive mechanism of the handle assembly such that an actuation of the trigger results in a rotation of the rotatable inner actuation shaft to fire a surgical anchor from the endoscopic surgical device.
 13. The endoscopic surgical device according to claim 12, wherein the handle assembly includes a second bevel gear defining a plurality of teeth operatively engaged with the plurality of teeth of the bevel gear, the second bevel gear secured to a proximal end portion of the rotatable inner actuation shaft.
 14. The endoscopic surgical device according to claim 13, wherein rotation of the bevel gear in the first direction causes a corresponding rotation of the second bevel gear in a first direction, the rotation of the second bevel gear in the first direction resulting in the rotation of the inner actuation shaft to fire a surgical anchor from the endoscopic surgical device.
 15. The endoscopic surgical device according to claim 14, wherein the endoscopic assembly includes: a support tube assembly having a proximal support tube portion extending from the handle assembly, and a distal support tube portion configured to removably receive the end effector; the inner actuation shaft being rotatably supported in the support tube, the inner actuation shaft including a proximal portion operatively connected to the second bevel gear, and a distal portion non-rotatably supporting a coupling member.
 16. The endoscopic surgical device according to claim 1, wherein the handle assembly includes a button supported thereon, the button movable between a first position wherein the button permits the actuation of the trigger, and a second position wherein the button blocks the actuation of the trigger.
 17. The endoscopic surgical device according to claim 16, further comprising a wall extending from the button, wherein when the button is in the second position, the wall of the button blocks the actuation of the trigger.
 18. An endoscopic surgical device configured to fire a surgical anchor into target tissue, the endoscopic surgical device comprising; a handle assembly including: a handle housing; a trigger defining a gear rack, the trigger operatively connected to the handle housing and movable between a fully un-actuated position and a fully actuated position; a pinion gear defining a plurality of teeth operatively engageable with the gear rack of the trigger, the pinion gear including an arm extending radially therefrom that defines a camming feature; a first bevel gear defining a first surface including a plurality of teeth and a camming feature selectively engageable with the camming feature of the pinion gear; a drive mechanism actuatable by the trigger; a timing system associating the trigger with the drive mechanism; and a second bevel gear defining a plurality of teeth operatively engaged with the plurality of teeth of the first bevel gear, the second bevel gear secured to a proximal end portion of the rotatable inner actuation shaft; and an endoscopic assembly including: a proximal end portion extending from the handle assembly; a distal end portion configured to support an end effector; a rotatable inner actuation shaft extending from the handle assembly and into the distal end portion of the endoscopic assembly, the rotatable inner actuation shaft being connected to the drive mechanism of the handle assembly such that an actuation of the trigger results in a rotation of the rotatable inner actuation shaft to fire a surgical anchor from the endoscopic surgical device, the rotatable inner actuation shaft including a proximal portion operatively connected to the second bevel gear, and a distal portion non-rotatably supporting a coupling member; a support tube assembly having a proximal support tube portion extending from the handle assembly; and a distal support tube portion configured to removably receive the end effector, the inner actuation shaft being rotatably supported in the support tube, wherein actuation of the trigger causes movement of the gear rack in a first direction, which causes rotation of the pinion gear in a first direction, and wherein rotation of the pinion gear in the first direction causes the camming feature of the pinion gear to selectively engage the camming feature of the first bevel gear to cause a corresponding rotation of the first bevel gear in a first direction, wherein rotation of the first bevel gear in the first direction causes a corresponding rotation of the second bevel gear in a first direction, the rotation of the second bevel gear in the first direction resulting in the rotation of the inner actuation shaft to fire a surgical anchor from the endoscopic surgical device.
 19. An endoscopic surgical device configured to fire a surgical anchor into target tissue, the endoscopic surgical device comprising; a handle assembly including: a handle housing; a trigger operatively connected to the handle housing and movable between a fully un-actuated position and a fully actuated position; a drive mechanism actuatable by the trigger; and a timing system associating the trigger with the drive mechanism, wherein the timing system includes: a raceway formed in a surface of the trigger, the raceway defining steps along a length thereof; and a deflectable arm having a first end disposed within the raceway and operatively associated with the steps thereof, and a second end connected to the handle housing; wherein the timing system maintains a timing of an actuation stroke of the trigger with an actuation of the drive mechanism to fire a single surgical anchor upon a single stroke of the trigger from the fully un-actuated position, to the fully actuated position, to the fully un-actuated position.
 20. The endoscopic surgical device according to claim 19, further comprising a gear rack defined by the trigger, and a pinion gear operatively engageable with the gear rack, wherein actuation of the trigger causes movement of the gear rack in a first direction, which causes rotation of the pinion gear in a first direction. 